如何抑制使用 pyshark 的 python 代码中的异常输出？

Question

使用

pyshark

0.6 在 Ubuntu 22.04.4 上运行以下 python 3.10.12 代码似乎忽略了 python 的

try-except

语句：

capture = pyshark.FileCapture(filename)
try:
    for packet in capture:
        pass 
except:
    print("exception")

即使我将读取循环包含在

try-except

语句中，我也会得到以下输出：

exception
Exception ignored in: <function Capture.__del__ at 0x79b5be57c3a0>
Traceback (most recent call last):
  File "/home/alex/.local/lib/python3.10/site-packages/pyshark/capture/capture.py", line 405, in __del__
    self.close()
  File "/home/alex/.local/lib/python3.10/site-packages/pyshark/capture/capture.py", line 393, in close
    self.eventloop.run_until_complete(self.close_async())
  File "/usr/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
    return future.result()
  File "/home/alex/.local/lib/python3.10/site-packages/pyshark/capture/capture.py", line 397, in close_async
    await self._cleanup_subprocess(process)
  File "/home/alex/.local/lib/python3.10/site-packages/pyshark/capture/capture.py", line 379, in _cleanup_subprocess
    raise TSharkCrashException(f"TShark (pid {process.pid}) seems to have crashed (retcode: {process.returncode}).\n"
pyshark.capture.capture.TSharkCrashException: TShark (pid 8097) seems to have crashed (retcode: 2).
Last error line: tshark: The file "/home/alex/Work/Data/test.pcap" appears to have been cut short in the middle of a packet.
Try rerunning in debug mode [ capture_obj.set_debug() ] or try updating tshark.

如何抑制这个输出？

澄清一下：我没有兴趣修复任何问题或错误。我只是对抑制异常的输出感兴趣！

Answer 1

根据

issue:

https://github.com/KimiNewt/pyshark/issues/339

以及

pyshark

最新版本的源代码，在这里https://github.com/KimiNewt/pyshark/blob/master/src/pyshark/capture/capture.py

366

方法中的

_cleanup_subprocess

行代码如下所示：

    async def _cleanup_subprocess(self, process):
        """Kill the given process and properly closes any pipes connected to it."""
        self._log.debug(f"Cleanup Subprocess (pid {process.pid})")
        if process.returncode is None:
            try:
                process.kill()
                return await asyncio.wait_for(process.wait(), 1)
            except asyncTimeoutError:
                self._log.debug(
                    "Waiting for process to close failed, may have zombie process.")
            except ProcessLookupError:
                pass
            except OSError:
                if os.name != "nt":
                    raise
        elif process.returncode > 0:
            if process.returncode != 1 or self._eof_reached:
                raise TSharkCrashException(f"TShark (pid {process.pid}) seems to have crashed (retcode: {process.returncode}).\n"
                                           f"Last error line: {self._last_error_line}\n"
                                           "Try rerunning in debug mode [ capture_obj.set_debug() ] or try updating tshark.")

我认为您正在处理

Exception

因为您正在终端中打印

exception

这个

Exception

出现了，但你没有注意到它在那之后发生 尝试用以下方式关闭您的

capture

：

capture = pyshark.FileCapture(filename)
try:
    for packet in capture:
        pass 
except:
    print("exception")

capture.close()